Usually, RV Wholesalers does not have the inventory they sell. As they sell a trailer they will order it and sometimes never see it. They have drivers pick them up at the manufacture and go straight to the customer. The trailers are not prepped, cleaned, inspected, filled with LP or any other things most dealers do. They make very little on the sale, but don't have any costs associated with it either. They sell a lot because people get sucked in. RV Wholesalers rely on the manufactures network of dealers to do the warranty or any other work to be done.
Reputable dealers, like I try to be, don't especially like this thinking. We have our own customers that we have to take care of, and yes I take care of MY customers first. I can be VERY competitive and I do take several deals away from them yearly but usually you will pay more from an average dealer. You do get more for your money. For one thing, you get service after the sale.